LSR7810 Datasheet, PDF (2/2 Pages) MicroPower Direct, LLC – Effi ciency to 93%

Model Selection Guide
www.micropowerdirect.com
Model
Number
LSR7810-015W
LSR7810-018W
LSR7810-02W
LSR7810-03W
LSR7810-05W
LSR7810-06W
Input
Voltage (VDC) Current
Nom. Range
(mA)
12 4.75 - 15.0 165
12 4.75 - 15.0 190
12 5.0 - 18.0 245
12 5.0 - 18.0 320
12 7.0 - 18.0 460
12 8.5 - 18.0 580
Output
Voltage (VDC)
Nom. Adj Range
1.5
Fixed
1.8 1.5 - 3.6
2.5 1.5 - 3.9
3.3 1.8 - 5.5
5.0 2.5 - 6.5
6.5
Fixed
Current
(A)
1.0
1.0
1.0
1.0
1.0
1.0
Efficiency (%, Max)
Min VIN
76
79
83
84
90
93
Max VIN
74
77
81
84
88
91
Notes:
1. Measured at an internal IC junction.
2. If the control pin (pin 10) is left open, the unit operates. If the
control pin is grounded, the unit is off.
3. This regulator is not designed to be used in parallel with another
unit to increase output power.
4. The input should not exceed the range given in the model
selection chart. Exceeding this limit could damage the unit.
5. If the output voltage is adjusted, the input/output relationship
must meet: VIN - VOUT = >2V. Attempting to operate below this
differential could damage the unit.
Derating Curve
Typical Application Circuits
Mechanical Dimensions
The figure at above shows a typical connection of the LSR7810. Some notes on this connection are:
1. C1 & C2 are low ESR ceramic capacitors used to minimize noise at the regulator. A tantalum or low ESR
electrolytic capacitor may also be used. These capacitors are required and should be mounted as close
to the regulator pins as possible.
2. R1 & R2 are used to adjust the regulator output. If this is not required, the VADJ pin (pin 6) should be connected
to ground through 470 pF ceramic capacitor. For more information on adjusting the output, please contact
the factory.
3. A simple LC network may be used to improve the output ripple of the unit. This is illustrated by LOUT and COUT.
Pin Connection
Pin Function
1
+VIN
5 +VOUT
6
VADJ
Pin Function
7 Gnd
9 Gnd
10 Control
Solder Layout
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Notes:
• All dimensions are typical in inches (mm)
• Tolerance x.xx = ±0.02 (±0.50)
• Pin 1 is marked by a “dot” or indentation on the side of the unit
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